GitHub Pages examples
Fine examples of projects using GitHub Pages (https://pages.github.com).
Gather, curate, and feature stories of public servants and civic hackers using GitHub as part of their open government innovations
A simple, static portal which outlines our open source offerings.
A listing of open source efforts at Twitter on GitHub
A showcase of projects we've open sourced and open source projects we use
The Artsy Engineering Open-Source Developers Blog